$292+ Cheap flights from Ontario to Billings (ONT - BIL)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/3. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BIL
Nov 12 — Nov 191
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Billings with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Ontario to Billings
Cheapest
Best
Last-minute
Cheapest flights from Ontario to BillingsExplore the most affordable flight options available from Ontario to Billings. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 13, 2026.
Explore the most affordable flight options available from Ontario to Billings. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 13, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/32:47 pm -
1 stop24h 38m
Sun 12/69:47 pm -
1 stop15h 04m
Deal found 10/12![Multiple Airlines logo]()
$292
This Kiwi.com deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2510:32 pm -
1 stop14h 35m
Mon 1/412:00 pm -
1 stop20h 07m
Deal found 10/9![Multiple Airlines logo]()
$306
This Kiwi.com deal was found by Cheapflights users on 10/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2410:40 pm -
1 stop21h 41m
Sun 11/2910:11 pm -
1 stop10h 09m
Deal found 10/11![Multiple Airlines logo]()
$332
This Kiwi.com deal was found by Cheapflights users on 10/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/208:15 am -
1 stop7h 52m
Fri 11/2711:41 am -
2 stops20h 39m
Deal found 10/12![Multiple Airlines logo]()
$363
This Delta deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/306:00 am -
1 stop5h 19m
Mon 1/46:25 pm -
1 stop5h 23m
Deal found 10/9![Delta logo]()
$380
This United Airlines deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/231:24 pm -
1 stop6h 46m
Tue 10/272:42 pm -
1 stop7h 09m
Deal found 10/8![United Airlines logo]()
$441
This United Airlines deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/105:00 am -
1 stop7h 29m
Wed 11/115:00 am -
2 stops8h 29m
Deal found 10/8![United Airlines logo]()
$446
This United Airlines deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/248:03 am -
2 stops12h 07m
Wed 10/285:00 am -
2 stops8h 29m
Deal found 10/9![United Airlines logo]()
$451
Best flights from Ontario to BillingsDiscover carefully curated flight deals from Ontario to Billings that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 13, 2026.
Discover carefully curated flight deals from Ontario to Billings that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 13, 2026.
This United Airlines deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/231:24 pm -
1 stop6h 46m
Tue 10/272:42 pm -
1 stop7h 09m
Deal found 10/8![United Airlines logo]()
$441
This Alaska Airlines deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/305:30 pm -
1 stop20h 34m
Fri 11/65:12 pm -
1 stop6h 54m
Deal found 10/8![Alaska Airlines logo]()
$441
This United Airlines deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/241:52 pm -
2 stops8h 01m
Wed 10/282:42 pm -
1 stop7h 09m
Deal found 10/9![United Airlines logo]()
$446
This United Airlines deal was found by Cheapflights users on 10/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/105:00 am -
1 stop7h 29m
Wed 11/115:00 am -
2 stops8h 29m
Deal found 10/12![United Airlines logo]()
$446
Last-minute flights from Ontario to BillingsDiscover last-minute flight deals from Ontario to Billings. Data last updated October 13, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Billings. Data last updated October 13, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/235:03 pm -
1 stop4h 22m
Tue 10/275:20 am -
1 stop4h 35m
Deal found 10/9![Delta logo]()
$441
This United Airlines deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/248:03 am -
2 stops12h 07m
Wed 10/285:00 am -
2 stops8h 29m
Deal found 10/9![United Airlines logo]()
$451
This Alaska Airlines deal was found by Cheapflights users on 10/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/305:30 pm -
1 stop20h 34m
Fri 11/65:12 pm -
1 stop6h 54m
Deal found 10/11![Alaska Airlines logo]()
$466
This United Airlines deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/105:00 am -
1 stop7h 29m
Wed 11/115:00 am -
2 stops8h 29m
Deal found 10/8![United Airlines logo]()
$446
This Alaska Airlines deal was found by Cheapflights users on 10/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/104:09 pm -
1 stop5h 34m
Wed 11/1111:55 am -
1 stop7h 22m
Deal found 10/12![Alaska Airlines logo]()
$460
This Kiwi.com deal was found by Cheapflights users on 10/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/208:15 am -
1 stop7h 52m
Fri 11/2711:41 am -
2 stops20h 39m
Deal found 10/12![Multiple Airlines logo]()
$363
This Kiwi.com deal was found by Cheapflights users on 10/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2410:40 pm -
1 stop21h 41m
Sun 11/2910:11 pm -
1 stop10h 09m
Deal found 10/11![Multiple Airlines logo]()
$332
Find flight deals from Ontario to Billings
Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Billings (BIL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $292 (Kiwi.com) |
Popular in | October |
Cheapest in | February |
Average price | $625 |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Billings that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated October 13, 2026.
Use the filters below to find and compare flights from Ontario to Billings that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
OntarioBillings
ONT Ontario - BIL Billings Logan Intl
ONTBIL
Ontario
Fri 10/23
1:24 pm-9:10 pm
1 stop6h 46m
Billings Logan Intl
Tue 10/27
2:42 pm-8:51 pm
1 stop7h 09m
$441
OntarioBillings
ONT Ontario - BIL Billings Logan Intl
ONTBIL
Ontario
Fri 10/30
5:30 pm-3:04 pm
1 stop20h 34m
Billings Logan Intl
Fri 11/6
5:12 pm-11:06 pm
1 stop6h 54m
$441
OntarioBillings
ONT Ontario - BIL Billings Logan Intl
ONTBIL
Ontario
Sat 10/24
1:52 pm-10:53 pm
2 stops8h 01m
Billings Logan Intl
Wed 10/28
2:42 pm-8:51 pm
1 stop7h 09m
$446
OntarioBillings
ONT Ontario - BIL Billings Logan Intl
ONTBIL
Ontario
Tue 11/10
5:00 am-1:29 pm
1 stop7h 29m
Billings Logan Intl
Wed 11/11
5:00 am-12:29 pm
2 stops8h 29m
$446
Sorted by cheapest first
Compare providers for flights from Ontario to Billings
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Billings in October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Ontario-Billings flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Billings flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Billings flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Ontario-Billings flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Billings flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Ontario to Billings
Have a flexible travel schedule? Discover the best time to fly to Billings from Ontario with our price prediction graph.
ONT-BIL
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Ontario to Billings
Reviews of airlines servicing Billings
Get insights into the airlines that provide service to Billings. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Billings. Reviews last updated October 13, 2026.
Read through reviews of airlines operating flights from Ontario to Billings, such as Alaska Airlines,Delta, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.8
Food
7.0
Boarding
8.1
Entertainment
7.0
Overall
7.9
Crew
8.5
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Comfort
7.8
Food
7.0
Boarding
8.1
Entertainment
7.0
Overall
7.9
Crew
8.5
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Comfort
7.8
Food
7.0
Boarding
8.1
Entertainment
7.0
Overall
7.9
Crew
8.5
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Comfort
7.8
Food
7.0
Boarding
8.1
Entertainment
7.0
Overall
7.9
Crew
8.5
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Related info for your journey
Find useful and relevant information for your journey from Ontario to Billings. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Ontario to Billings
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Other flights to Billings
Explore flights to Billings departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on October 13, 2026.
Complete your trip
Complete your trip to Billings by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to Billings by cabin class
Find flights from Ontario to Billings, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ontario and Billings flights
Browse other Ontario and Billings flight options. Last updated on October 13, 2026.
Other flights from Ontario
Browse through other flights departing from Ontario. Flights are based on user searches made on Cheapflights and were last updated on October 13, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 3 airlines flying from Ontario to Billings
Discover the top 3 airlines that operate flights from Ontario to Billings. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated October 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$260 | Average$360 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$269 | Average$619 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$279 | Average$415 | FlexibilityNo cancel fee | On-time69% |